Shirley Bassey rarely does "behind the scenes". In fact, she rarely does interviews of any kind, preferring to let her prodigious voice and that painstakingly cultivated air of glamour do the talking. So it is a little disappointing to find she is not glugging the pink Cristal champagne rumoured to sustain her day to day. She is making do instead with a single cup of fresh mint tea. Neither is she wearing a show-stopping creation from Julien Macdonald or Vivienne Westwood. And, when we meet, she most certainly does not offer to sing. She is very much off duty, sporting...